Operate: 1Set Time: Long Press "Down" key into setting time. Click "Up","Down" to select time, and Long Press "Down" key to finish. 212/24 hour module: Click "Up" key to change 3Sleep module. Long Press "UP", while no display , into sleep module(22:00~07:00 no display. 07:00~22:00 display). Display all "0"number,out of sleep module. 4Set back color: Click "Down" to change color. when color refresh that means it is into change color automatic (every day change one color),or color is fixed. : -USB 5V 1A Material:Metal + pc colour:blue Package Contents: 1 * circuit board 1 * Acrylic Enclosure Box 1 * Screw kit Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.